The humans have set up a defense well for the way into the tunnel.
They, however, did not expect to be attacked from above.
Numerous rushers were dropped in via portal right ontop of the camp, many of the human guards were caught off-guard, their reactions not fast enough before sharp claws and many, many teeth sinks into them. "ALARM!" One of them managed to scream out while drowning in rushers, not that an alarm needed to be sounded.
Tents were opened as more humans came out to see what's going on, at the sight of the gruesome battle, they begin to cast their deadly spells at the Rushers. Their strange battle staves barking crackling thunders, invisible to the eyes yet it's effect were obvious. Rushers that were pointed at pratically begin to get rip apart by a powerful, invisible force.
The battle begin to spread out as rusher piles divert their attention to the other humans, rushing forward to meet the wizards.
Then one of the humans dropped her battle staff in favor of two equally strange-looking battlewands and, unexpectedly, rush up to meet the rushers.
Her attack reminded you of the elves, memories of battle from the dwarves that you've consumed. Graceful, fluid and deadly. Her battle wands blasting apart heads as she flurry into the fight, turning the tide over and encouraging the other humans to fight harder.
Maybe they'd think for a moment that they can survive this, but you know better. They're as hopeless as they come, you've more rushers and your Horror Knights haven't even joined the fight properly yet!